- na⇄adv. 1. no.
2. not (in compounds with ?could, should, etc.).
Ex. He canna sit still.
conj. (Obsolete.) nor. - Na⇄Na(no period),
sodium (chemical element). - NA⇄NA(no periods),
1. noradrenaline.
2. (Optics.) numerical aperture. - na⇄na, adverb, conjunction.
(Scottish.)